DIAGNOSIS The hinge isn't adjustable. The problem is usually the magnetic door gasket losing its seal or the fridge being tilted slightly backward.
FIX Check the level. The fridge should be tilted VERY slightly forward so gravity helps close the door. Adjust the front leveling feet (turn clockwise to lower, counter-clockwise to raise) to achieve a slight forward tilt.
IF THAT DIDN'T WORK Clean the magnetic door gasket thoroughly with warm soapy water. Food residue or stickiness can prevent a good seal. Dry it completely. Check for any physical damage or permanent warping.
HEADS UP If the gasket is physically damaged or the magnet inside has failed, the door won't seal properly. This is a common wear part and may need replacement if cleaning and leveling don't fix it.